Ubisoft's April 2016 trademark filing is under Class 9, which includes game software. And according to DualShockers, the filing is "entirely separate" from Class 41, which is for "online components" for game software. However, Ubisoft does still have a United States trademark listing for 1666 under Class 9 and Class 41 from its 2012 listing.

Though not much is known about the game, some speculate 1666 could refer to the Great Fire of London, the disaster in which 70,000 homes were destroyed.